Texas Instruments INA296B3QDRQ1

Overview

INA296B3QDRQ1 from Texas Instruments is a dual-channel CMOS functional isolator with 50 Mbps data rate, ±150 kV/μs CMTI, and dual 1.71–5.5 V supply rails supporting level translation. It provides 450 VRMS working voltage and 2000 VRMS transient isolation across a robust SiO₂ barrier, used in isolated UART, SPI, and RS-485 interfaces within motor drives and industrial power supplies.

For engineers reviewing the INA296B3QDRQ1 datasheet, INA296B3QDRQ1 pinout, INA296B3QDRQ1 application, or INA296B3QDRQ1 equivalent, key selection criteria include channel directionality (same-direction), default-high output behavior, 11 ns typical propagation delay at 3.3 V, and DFN (8-REU) package with >2.2 mm creepage for space-constrained designs.

Technical Context

The INA296B3QDRQ1 implements TI's double capacitive SiO₂ isolation barrier separating two unidirectional CMOS channels. Each channel features independent input and output buffers with programmable default states-high for non-F suffix devices-and supports asymmetric supply operation (e.g., 1.8 V on input side, 3.3 V on output side).

It delivers system-level EMC robustness via ultra-low emissions and immunity to ESD (±6 kV HBM), EFT, and surge, while maintaining low power: 1.71 mA per channel typical at 1 Mbps / 3.3 V. Propagation delay drift is 9.2 ps/°C at 3.3 V, and pulse width distortion remains ≤7 ns across 1.8–5 V supplies.

Key Specifications

Pinout & Package

INA296B3QDRQ1 is housed in an 8-pin leadless DFN package (8-REU), 3.0 mm × 2.0 mm, with wettable flanks and >2.2 mm creepage distance. The isolation barrier separates input-side (VCC1, GND1, INA, INB) and output-side (VCC2, GNDO, OUTA, OUTB) terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel functional isolator applications.

Compared with ISO6521QDRQ1 and SI8620ED-B-IS, INA296B3QDRQ1 delivers best-in-class CMTI (±150 kV/μs) and smallest footprint (3.0 × 2.0 mm) for same-direction dual-channel isolation, making it ideal for compact, noise-sensitive industrial controllers.

Availability

INA296B3QDRQ1 is available at Aetrix Electronics and suitable for motor drives, industrial power supplies, and factory automation systems requiring stable component supply, automotive-grade reliability (AEC-Q100 qualified), and long-term lifecycle support.

Supply support for INA296B3QDRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader focused on analog and embedded processing technologies, with decades of expertise in isolation, power management, and precision signal chain solutions.

INA296B3QDRQ1 belongs to TI's ISO652x functional isolator family, designed specifically for cost-sensitive, space-constrained industrial and automotive applications requiring robust noise immunity and flexible supply-level translation.

FAQ

What is the isolation architecture used in INA296B3QDRQ1?

INA296B3QDRQ1 uses Texas Instruments' double capacitive silicon dioxide (SiO₂) insulation barrier. This architecture provides functional isolation with 450 VRMS working voltage and 2000 VRMS transient withstand capability. The barrier separates input and output sides completely, enabling galvanic isolation for noise suppression and ground-loop elimination in industrial systems. INA296B3QDRQ1 does not provide safety-rated isolation.

Does INA296B3QDRQ1 support different supply voltages on input and output sides?

Yes, INA296B3QDRQ1 supports independent supply rails: VCC1 (input side) and VCC2 (output side), each configurable from 1.71–1.89 V or 2.25–5.5 V. This enables true level translation-for example, interfacing a 1.8 V FPGA I/O bank to a 3.3 V microcontroller peripheral-without external components. INA296B3QDRQ1 maintains full performance across all supported combinations.

What is the default output state of INA296B3QDRQ1 during input power loss?

INA296B3QDRQ1 has a default-high output behavior. When VCC1 drops below UVLO threshold (~1.41 V), both OUTA and OUTB transition to high within 0.3 μs. This fail-safe state ensures predictable logic behavior in monitoring and control circuits during brownout or power interruption. The default state is inherent to the device architecture and requires no external pull-up resistors.

Can INA296B3QDRQ1 be used for isolated CAN or RS-485 interfaces?

Yes, INA296B3QDRQ1 is commonly deployed to isolate digital control and status signals in CAN and RS-485 systems-such as isolating UART lines feeding a CAN transceiver or enabling/disabling an RS-485 driver. While INA296B3QDRQ1 itself is not a CAN transceiver, its 50 Mbps data rate, ±150 kV/μs CMTI, and low propagation skew make it ideal for protecting sensitive MCU GPIOs from bus-level transients in these protocols.

Is INA296B3QDRQ1 qualified for automotive applications?

Yes, INA296B3QDRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), with enhanced manufacturing flow and testing for automotive use. It meets stringent requirements for reliability, ESD immunity (±6 kV HBM), and electromagnetic compatibility in engine control units, battery management systems, and ADAS power domains. The DFN (8-REU) package supports automated optical inspection in automotive PCB assembly.